Burglar alarm



J. E. LEE

BURGLAR ALARM May 29, 1923.-

--Filed Oct. 9, 1920 2 Sheets-Sheet -1 //V VE N TO P 6 WITNESSES Patented May 29, 1923.

UNITED STATES 1,457,176 PATENT 'OFFICE'.

JOHN 1:. LEE, or MILWAUKEE, WISCONSIN.

BURGLAR ALARM.

Application filed October 9, 1920. Serial m).'41s,7ss.

T 0 all whom it may concern:

Be it known thatxI, JOHN E. LEE, a citizen of the United States, and resident of Milwaukee, county of Milwaukee, and State of Wisconsin, have invented new and useful Improvements in Burglar Alarms, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

The invention relates to burglar alarms.

One object of the invention is to provide a burglar alarm which not only fires a plurality of cartridges to surprise and frighten the intruder but also gives notice at a point removed from the device of the presence of the intruder.

A further and important object of the invention is to provide an improved device for producing a succession of shots similar to the action of a revolver upon a single actuation of the device and thus frighten the robber. v

The] invention further consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings: Fig. 1 is a view of a device embodying the invention, parts being broken away, the device being shown set for giving the alarm; Fig. 2 is a view similar to Fig. 1 showing the device in actuation; Fig. 3 is a section taken on the line 33 of Fig. 1; Fig. 4 is a section taken on the line 4-4 of Fig. '1; Fig. 5 is a section taken on the line'55 of Fig. 2; Fig. 6 is a section taken on the line 6-6 of Fig. 2.

In the drawings the numeral 7 designates a box provided with a hinged cover 8 and a partition 9.

. A heavy metal block 10 is mounted in the bottom of the box and provided with firing chambers 11 and bores 12 in communication with said chambers and adapted to receive cartridges,the flanged ends of the cartridges resting upon the top of the block against said bores.

. Sets of guide rods 13 and 14 are mounted on the block 10 and extend to the partition 9. Firing hammers 15 and 16 carrying firing pins 17 are slidably mounted on the rods 13 and 14 respectively, said firing pins adapted to strike the primers of the cartridges when the hammers drop to a position adjacent the block 10.

The hammer 15 is provided with a hooked portion 18 engageable with a hook 19 pivotally mounted on a bracket 20 carried by the partition 9 and having a rod 21 forming its shank. A trigger 22 is pivotally mounted on a shaft 23 carried by the partition and has fingers 24 and 25. The outer end of the rod 21 rests upon the finger 24 and the finger 25 engages a shoulder 25 formed on the hook to hold said hook against movement until the trigger is released.

The hammer 15 carries an apertured lug 26 through which a rod 27 passes, said lug being freely slidable upon the rod 27. The upper end of the rod 27 is pivotally connected to the shank of a hook 28 pivotally mounted on the under side of the partition 9. The hammer 16 is provided with a hook portion 29 engageable with the hook 28. The lower end of the rod 27 isslidably mounted in an opening 30 in the block 10 and carries a stop 31, a spring 32 being mounted on said rod between said stop and said block.

The trigger 22 when set holds the hook 19 in engagement with hook 18 so that hammer 15 is suspended above block 10 and the spring 32 acting on the rod 27 holds the hook 28 in engagement with the hook 29 so that hammer 16 is suspended above the block. On a release of the trigger 22 from engagement with hook 19, the hammer 15 falls and its firing pin strikes the cartridge in line therewith in block 10, exploding it. Just before hammer 15 reaches the end of its movement the lug 26 strikes the stop 31, moves the rod 27 downwardly thereby releasing hook 28 from hook 29 so that hammer 16 falls and explodes the other cartridge. Thus the hammers 15 and 16 are released in succession to successively fire the cartridges in the block 10 to simulate the shots from a revolver. Theends of the hooks 19 and 28 are curved so that when the hammers 15 and 16 are raised they will automatically swing back and then into engagement with the hooks on the hammers. Furthermore, as the hook 18 swings the hook 19 upwardly the end of the rod 21 acts against the finger 24 to swing the trigger 22 upwardly so that finger 25 engages the shoulder 25' when the hooks l8 and 19 are engaged, this-being effected without the necessity of the operator setting the trigger 22 by hand, as the simple raising of the hammer 25 to cocked position sets the trigger 22.

The release of the trigger 22 may be accomplished either by an upward pull on the trigger by an invisible cord 33 stretched across a space where the burglar will run into it or by electrical means operated when the intruder opens the door or window.

The electrical means herein shown comprises a pair of electromagnets 84; in circuit with a battery 36, the control switch 35 being of any suitable construction and adapted to be operated as by the opening of a door or window. The trigger 22 has a part -37 disposed adjacent the electromagnet 34 and which forms the armatures for said magnets. On the energization of the mag nets 3% by the closing of the switch 35 the trigger is released to cause the actuation of the hammers 15 and 16, as previously described. I v

In order that a warning may be given at a pointremoved from the device, one of the hammers, such as 16, is provided with a pin 38 adapted to pass through an opening 39 in the block 10 and establish contact between normally separated switch contacts l0 and ell in a circuit 42 containing a battery a3, light 4% and bell 4L5 whenthe hammer '16 reaches the "end of its movement. The closing of the circuit 42 then lights the light 4st and rings thebell 45 at a .point removed fronrthe device and gives notification of the presence of the intruder.

The firing chambers 11 may have outside communication by screen covered openings -l-(i in the cover, or-such openings may be made in the top or bottom of theblock, the screensbeing used to prevent the expulsion of-the cartridge wads from the chambers when the cartridges are exploded.

desire it to be understood that this invention'is not to be limited to any specific lorm or arrangement of parts except in so anas such limitations are specified in the claims.

What I claim as my invention is:

1. An alarm device comprisinga pair of vertically reciprocal firing hammers, guide means for said hammers, cartridge holding means thereunder, movable suspension hooks engageable with said hammers, a rod connected to the hook for the second hammer and provided with a stop engageable with a part on the first firing hammer to release the second hammer on the descent of the first hammer, and means 'for releasing the first hammer from its hook.

2. An alarm device comprising a pair of gravity actuated firing hammers, guide means for said hammers, cartridge-holding means thereunder, movable suspension hooks engageable with said hammers, a, trigger controlling the release of the hook for one hammer, and a rod moved by the triggercontrolled hammer on its descent to release the hook for the other hammer.

3. An alarm device comprising a pair of gravity actuated firing hammers, cartridgeholding means thereunder, guide means for said hammers, movable suspension hooks automatically engageable with said hammers whensaid hammers are raised to cocked position, a trigger controlling one of said hooks and automatically engageable therewith when the 'hammer for this hook is raised to cocked position, and means actuated by the trigger-controlled hammer for releasing the suspension hook 01" the other hammer.

4. An alarm device, comprising a pair of gravity actuated firing hammers, guide means for said hammers, cartridge-holding means'thereunder, movable suspension hooks automatically engageable with said hammers when said hammers areraised to cocked position, a spring-pressed rod acting on one of said hooks to hold it in cocked position, a trigger controlling the other hook and automatically engageable therewith when the hammer for this hook is raised to cocked position, and means carried by the trigger-controlled hammer for moving said rodto release position.

5. An alarm device comprising a support, rods mounted thereon, gravity actuated firing hammers s'lidably mounted on said rods, cartridge-holding 'means under said hammers, movable suspension hooks automatically engageable with said hammers when said hammers are raised to cocked posi tion, a spriiigpressed rod acting on one of said hooks to hold it in cocked position, a trigger controlling the other hook and provided with fingers automatically engageable with said hook when the hammer for this hook is raised to cocked position, and means carried by the trigger-controlled hammer for moving said rod to release position.

6. An alarm device com nising a pair of vertically movable gravity-actuated firing hammers, guide means for saidhammers, cartridge holding means under said hammers, movable suspension hooks engageable with said hammers, a spring-pressed rod connected to the hook for the second hammer and provided with a stop engageable with a part on the first tiring hammer to release the second hammer on the descent of the first hammer, and means for releasing the first hammer from its hook.

In testimony whereof, I affix my signa ture.

JOHN E. LEE. 

